2012 MERCEDES-BENZ B-CLASS alarm

X
To lock centrally: press button :.
The SmartKey centrally locks/unlocks:
R the doors
R the tailgate
R the fuel filler flap
The turn signals flash once when unlocking
and three times when locking.
i When it is
dark, the surround lighting also
comes on if it is activated in the on-board
computer (Y page 198).
i You can also set an audible signal to
confirm that the vehicle has been locked.
The audible signal can be activated and
deactivated using the on-board computer
(Y page 199). Changing the settings of the locking
system
You can change the settings of the locking
system. When you then unlock the vehicle
only the driver's door and the fuel filler flap
are unlocked. This is useful if you frequently
travel on your own.
X To change the setting: press and hold
down the % and & buttons
simultaneously for approximately six
seconds until the battery check lamp
(Y page 70) flashes twice.
i If the setting of the locking system is
changed within the signal range of the
vehicle, pressing the &

or % button:
R locks or
R unlocks the vehicle
The SmartKey now functions as follows:
X To unlock the driver's door: press the
% button once.
X To unlock centrally: press the %
button twice.
X To lock centrally: press the & button.
X To restore the factory settings: press
and hold down

the % and & buttons simultaneously for approximately six
seconds until the battery check lamp
flashes twice (
Y page 70). Mechanical key
General notes If the vehicle can no longer be unlocked with
the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered (
Y page 65).
There are several ways to turn off the alarm:
X Press the

% or & button on the
SmartKey.
or
X Insert the SmartKey into the ignition lock.
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked
automatically.
X To unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key X
Push release catch : in the direction of
the arrow and at the same time remove
mechanical key ; from the SmartKey. SmartKey
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Opening and closing Z
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X
To open a front door: pull door
handle ;.
X To unlock a rear door: pull up locking
knob :.
The door is unlocked and can be opened.
X To open a rear door: pull door handle ;.
You can open a door from inside the vehicle
even if it has been locked. You can open the
rear doors from
inside the vehicle unless they
are secured by the child-proof lock
(Y page 58).
If the vehicle has previously been locked with
the SmartKey, opening a door from the inside
will trigger the anti-theft alarm system.
Switch off the alarm (Y page 65). Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside.

This can be useful if you wish
to lock the vehicle before pulling away, for
example. X
To unlock: press button :.
X To lock: press button ;.
The vehicle locks when all the doors and
the tailgate are closed.
Meanwhile, the fuel filler flap will not be
locked or unlocked.
You cannot unlock the vehicle centrally from
the inside if

the vehicle has been locked with
the SmartKey. You can open a door from inside the vehicle
even if it has been locked. You can open the
rear doors
from

inside the vehicle unless they
are secured by the child-proof lock
(Y page 58).
If the vehicle has previously been locked with
the SmartKey, opening a door from the inside
will trigger the anti-theft alarm system.
Switch off the alarm (Y page 65).
If the vehicle has been locked using the
locking button for the central locking, or has
been locked automatically, and a door is
opened from the inside:
R the vehicle will be fully unlocked if it had
previously been fully unlocked
R only the door which has been opened form
the inside is unlocked if only the driver's
door had been previously unlocked Automatic locking feature
X
To deactivate: press and hold button :
for about five

seconds until a tone sounds.
X To activate: press and hold button ; for
about five seconds until a tone sounds.
i If you press one of the two buttons and
do not
hear

a tone, the relevant setting has
already been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are
turning. 74
Doors
Opening and closing
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You could therefore lock yourself out if:
R
the vehicle is being pushed.
R the vehicle is being towed.
R the vehicle is on a roller dynamometer.
You can also switch the automatic locking
function on and off using the on-board
computer (Y page 198). Unlocking the driver's door
(mechanical key)
If the vehicle
can no longer be unlocked with
the SmartKey, use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm
system will be triggered ( Y page 65).
X Take the mechanical key out of the
SmartKey (Y page 69).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. X
Turn the mechanical key counter-clockwise
to position 1.
The door is unlocked.
X Turn the mechanical key back and remove
it.
X Insert the mechanical key into the
SmartKey. Locking the vehicle (mechanical key)
If the vehicle

can no longer be locked with the
SmartKey, use the mechanical key. X
Open the driver's door.
X Close the front-passenger door, the rear
doors and the tailgate.
X Press the locking button (Y page 74).
X Check whether the locking knobs on the
front-passenger door and the rear doors
are still visible. Press down the locking
knobs manually, if necessary (Y page 73).
X Close the driver's door.
X Take the mechanical key out of the
SmartKey (

Y page 69).
X Insert the mechanical key into the lock of
the driver's door as far as it will go. X
Turn the mechanical key clockwise as far
as it will go to position 1.
X Turn the mechanical key back and remove
it.
X Make sure that the doors and the tailgate
are locked.
X Insert the mechanical key into the
SmartKey.
i If you lock

the vehicle as described above,
the fuel filler flap is not locked. The anti-
theft alarm system is not armed. Cargo compartment
Important safety notes
G
WARNING
Combustion engines emit poisonous exhaust
gases such as

carbon monoxide. If the tailgate
is open when the engine is running, Cargo compartment
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Opening and closing
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Locked Remotely message appears in the
multifunction display.
USA only: alternatively, the vehicle can be
locked via:
R
the Internet, under the "Owners Online"
section
R the telephone application (e.g. iPhone ®
,
Blackberry)
To do this, you will need your identification
number and password.
i The vehicle remote closing feature is
available when the relevant mobile phone
network is
available
and data connection is
possible.
Stolen vehicle recovery service If your vehicle has been stolen:
X
Notify the police.
The police will issue a numbered incident
report.
X This number will be forwarded to the
Mercedes-Benz Customer Assistance
Center together with your PIN.
The Mercedes-Benz Customer Assistance
Center then attempts

to locate the mbrace
system. The Mercedes-Benz Customer
Assistance Center contacts you and the
local law enforcement agency if the vehicle
is located. However, only the law
enforcement agency is informed of the
location of the vehicle.
i If the anti-theft

alarm system is activated
for longer than 30 seconds, the Mercedes-
Benz Customer Assistance center is
automatically informed.
Vehicle remote malfunction diagnosis With the vehicle remote malfunction
diagnosis (Vehicle Health Check), the
Customer Assistance center can provide
improved support for problems with your
vehicle. During an existing call, vehicle data
is transferred to the Customer Assistance
center. The customer service representative can use the received data to decide what kind
of assistance is required. You are then, for
example, guided to the nearest Mercedes-
Benz Service center or a recovery vehicle is
called.
If
vehicle
data

needs to be transferred during
an MB Info call or a Roadside Assistance call,
this is initiated by the Customer Assistance
center. You will see the Roadside
Assistance Connected message in the
COMAND display. If the vehicle remote
malfunction diagnosis is able to be started,
the Request for vehicle diagnosis
received. Start vehicle diagnosis?
message appears in the display.
X Press Yes to confirm the message.
X If the Vehicle Diagnosis: Please
switch on ignition. message appears:
turn the key to position 2 in the ignition
lock.
X If the Please follow the
instructions received
by

phone and
move your vehicle to a safe
position. message appears: follow the
instructions of the customer service
representative.
The message in the display disappears.
If you select Cancel, the vehicle remote
malfunction diagnosis is canceled
completely.
The vehicle operating state check begins.
Meanwhile, the Vehicle diagnosis
activated message appears.
When the check is finished, the Sending
vehicle diagnosis data...(Voice
connection may be interrupted
during data transfer.) message
appears. The
vehicle

data can now be sent to
the Customer Assistance center.
X Press OK to confirm the message.
The voice connection with the Customer
Assistance center is terminated.
The Vehicle Diagnosis:
Transferring data... appears.258
Features
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simultaneously. Different settings are
possible for each area.
USA only: these settings can be called up
under "Owners Online" at http://
www.mbusa.com.
Alternatively, you can trigger an MB Info call
and inform the customer service
representative that you wish to activate geo
fencing.
Currently inactive areas can be activated by
SMS.
Triggering the vehicle alarm
With this function, you can trigger the
vehicle's panic alarm via SMS. An alarm
sounds and the exterior lighting flashes.
Depending on the setting, the panic alarm
lasts five or ten seconds. Afterwards, the
alarm switches off.
Garage door opener
Important safety notes G
WARNING
When you operate or program the garage door
with the integrated garage door opener,
persons in the range of movement of the
garage door can
become trapped or struck by
the garage door. There is a risk of injury.
When using the integrated garage door
opener, always make sure that nobody is
within the range of movement of the garage
door. G
WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases

leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces
without sufficient ventilation.
The HomeLink ®
garage door opener
integrated in the rear-view mirror allows you to operate up to three different door and gate
systems.
Only operate garage doors using the
integrated garage door opener if:
R
they are equipped with a safety stop and
reverse feature, and
R they conform to the current U.S. safety
standards.
When programming a garage door opener,
park vehicle outside the garage.
i Certain garage door drives are
incompatible with the integrated garage
door opener. If you have difficulty
programming the integrated garage door
opener, contact an authorized Mercedes-
Benz Center.
Alternatively, you can call the following
telephone assistance services:
R USA: Mercedes-Benz Customer
Assistance Center at
1-800-FOR-MERCedes
R Canada: Customer Service at
1-800-387-0100
R HomeLink ®
hotline 1-800-355-3515
(free of charge)
More information on HomeLink ®
and/or
compatible products is also available
online at http://www.homelink.com.
i Notes on the declaration of conformity
( Y

page 23).
Programming Programming buttons
Observe the "Important safety notes"
(Y page 260).260
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